Separating device for solids and liquids



May 10, 1932.

A. E. LEEK SEPARATING DEVICE FOR SOLIDS AND LIQUIDS Filed Jan. 21, 1950 Fig.1. 5y

2 Sheets-Sheet l //V VE/V TOR WWW,

1 77' TOR/V156 A. E. LE EK May 10, 1932.

SEPARATING DEVICE FOR SOLIDS AND LIQUIDS Filed Jan. 21, 1930 2 Sheets-Sheet Patented May 10, 1932 UNITED STATES PATENT ALBERT EDWARD LEEK, OF WIGAN, ENGLAND, ASS-IGNOR-IO WIG'AN COAL AND IRON COMPANY, LIMITED, WIGAN, ENGLAND, A IBRITISH COMPANY SEPARATING DEVICE FOR SQLIDS AND LIQUIDS Application filed January 21, 1930, Serial No. 422,407, and in Great Britain January 25, 1929.

The present invention relates to improvements in separating or filtering devices, for the removal of solids from mixtures of solids and liquids, such as coal slurries, taken by way of example, of the type in which a number of filtering trays are superposed within a container, which are pivoted about their axes,

so that they may be tipped to d scharge the matter deposited upon them from the liquid or slurry.

According to the present invention a number of filter trays are mounted within a container about pivotal axes, which are staggered one relatively to the other; for instance these axes may lie, not in a vertical plane as has been hitherto usual, but in a plane at an angle to the vertical.

By this means, it will be possible to provide a larger number of trays for a given volume of container than has hitherto been possible, and yet to allow of the same freedom of swinging of the tray about its pivotal axis for discharge purposes.

The invent on is more particularly described with reference to the accompanying drawings, in which Fig. 1 is a front elevation showing a pair of filtering or separating devices mounted adjacent to one another, with parts of the right hand device broken away.

Fig. 2 is a corresponding side view.

A container 1 for liquid slurry or the like material from which solids are to be removed or filtered is provided with a number of trays 2, 3, l, mounted about hollow pivotal axes 5 each of which hollow axes is connected to an outlet pipe 6.

It will be noticed that the pivotal axes 5 0 4 from one another both vertcally and horifor these tra s are sta cred or dis laced gether by connecting rods? to be operated from a common hand wheel 8 sothat they may be all tipped sinniltaneously; "If desired, theymay be tipped individually by separate tipping means. I v

The cylindrical body 1, inclined-titan an gle to the vertical may of course, be mountedon a cylindrical ortruncated conical'base 9 having its'axis disposed vertically. The trays may be of the type in which a perforated or reticulate surface'isadapted to take up a filter bed of material by-a-grav ity deposition from a liquid "slurry,' in"which it is immersed, and then subsequentlytohave liquid slurry filtered through it by the-action of'a pressure differencerthe accumulated fil-= ter bed on the trays being discharged peri odically. r

These trays can be mounted within a con tainer of usual form, but it may be desirable to mount these within a container, thc' nain body of which is of cylindrical cross-section inclined ata similar angle to the vertical as the plane containing thefaxes of the trays as above indicated.

The improvements of this invention are also applicable to leaching or the like apparatus for the treatment of solids with liquids.

It will be preferred in the case for instance of filtering slurry or the like materials, to fill the container by letting material into this at a number of difierent levels instead of filling it from one point at the top alone.

By this means a more rapid filtering is possible because the cakes of filtrate are more uniform in thickness and in the grading of the sizes of solids one with another.

Filtering preferably proceeds by allowing a bed of filtrate to form upon the pivotal trays when these are lying in a horizontal position and then subsequently applying the pressure difference to the container so that the liquid in this is drawn through the gravity formed filter beds on the trays and clear liquid passes 01f through the draw oil pipes connected to the hollow. trunnions. V

The angle of inclination of the sides of the container 1 to the vertical may conveniently be selected to be somewhat greater than the angle of repose of the filtered material periodically discharged from the trays.

Slurry or the like material to be filtered is passed into the container 1 through a main feed pipe having a number of connections 11, 12, 13 to the container 1. This allows for a more rapid filling of the container 1 than if a single connection were provided. 7 i

After one or more charges of slurry have 10 been filtered by drawing off *the liquor through the pipes 6, the filtercakes upon the staggered trays 2, 3, 4; may be discharged by operating the hand Wheel 8 subsequent to the opening of the door 1 4 closing the bot- 15 tom of the container 1, the filter cakes fall ing into a Wagon body Wor other receptacle upon rails 15 below the container, Whereupon the door 14,- can be reclosed andfurther filtering can proceed. 7

The door itself may also serve as a filter surface and be provided with a pipe 17 for drawing. ofi' liquor. V 1

I declare that what I claim is A device for the separation of solids from mixtures of liquids and solidscomprising a container, the axis of whichis inclined to the vertical, a plurality of filter trays, the edges of which lie in planes parallel to the axis of the container, means to pass liquid and solid material to said container, means to draw ofl' liquid from said trays individually, an extension piece on the lower end of said container disposed about a vertical axis, a closing door normally lying in a: horizontal 3!! plane, a filter tray mounted on said door, means to draw ofi' liquid from the interior to said tray, means to tilt said door with said tray about a horizontal axis to discharge the filter cake upon it, and means to tilt said filter trays individually to separately discharge filter cakes upon them. V i

In witness whereof, I have hereunto signed my name this 2nd day of January, 1930.

5 ALBERT EDWARD LEEK. 

